Blood Bank
Paddy is in a serious car crash. A week later he comes out of the coma. He asks the doc how bad it is.
The doc tells Paddy there's good news and there's bad news. Paddy asks for the bad news first. The doc informs him that the hospital was running out of blood so they gave Paddy two pints of afro-caribbean blood and two pints of eastern eurpoean blood. Paddy says this isn't so bad and asks the doc for the good news.
The doc informs Paddy that his tool is now eight inches longer and he's top of the housing list!